diff options
author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2013-07-15 17:45:03 +0200 |
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committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2014-05-20 13:05:58 +0200 |
commit | d426d9fba8ea5d728038a9bea6a7c51f11941157 (patch) | |
tree | 447cd6550e5d99703763c96e12c83f699c71275f /kvm-all.c | |
parent | 7bca3892cb951afb5945480b090e3fb93578cd6a (diff) | |
download | qemu-d426d9fba8ea5d728038a9bea6a7c51f11941157.zip qemu-d426d9fba8ea5d728038a9bea6a7c51f11941157.tar.gz qemu-d426d9fba8ea5d728038a9bea6a7c51f11941157.tar.bz2 |
s390x/virtio-ccw: wire up irq routing and irqfds
Make use of the new s390 adapter irq routing support to enable real
in-kernel irqfds for virtio-ccw with adapter interrupts.
Note that s390 doesn't provide the common KVM_CAP_IRQCHIP capability, but
rather needs KVM_CAP_S390_IRQCHIP to be enabled. This is to ensure backward
compatibility.
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'kvm-all.c')
-rw-r--r-- | kvm-all.c | 38 |
1 files changed, 37 insertions, 1 deletions
@@ -27,6 +27,7 @@ #include "sysemu/sysemu.h" #include "hw/hw.h" #include "hw/pci/msi.h" +#include "hw/s390x/adapter.h" #include "exec/gdbstub.h" #include "sysemu/kvm.h" #include "qemu/bswap.h" @@ -1236,6 +1237,35 @@ static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq, return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); } +int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) +{ + struct kvm_irq_routing_entry kroute; + int virq; + + if (!kvm_gsi_routing_enabled()) { + return -ENOSYS; + } + + virq = kvm_irqchip_get_virq(s); + if (virq < 0) { + return virq; + } + + kroute.gsi = virq; + kroute.type = KVM_IRQ_ROUTING_S390_ADAPTER; + kroute.flags = 0; + kroute.u.adapter.summary_addr = adapter->summary_addr; + kroute.u.adapter.ind_addr = adapter->ind_addr; + kroute.u.adapter.summary_offset = adapter->summary_offset; + kroute.u.adapter.ind_offset = adapter->ind_offset; + kroute.u.adapter.adapter_id = adapter->adapter_id; + + kvm_add_routing_entry(s, &kroute); + kvm_irqchip_commit_routes(s); + + return virq; +} + #else /* !KVM_CAP_IRQ_ROUTING */ void kvm_init_irq_routing(KVMState *s) @@ -1256,6 +1286,11 @@ int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) return -ENOSYS; } +int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter) +{ + return -ENOSYS; +} + static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) { abort(); @@ -1285,7 +1320,8 @@ static int kvm_irqchip_create(KVMState *s) int ret; if (!qemu_opt_get_bool(qemu_get_machine_opts(), "kernel_irqchip", true) || - !kvm_check_extension(s, KVM_CAP_IRQCHIP)) { + (!kvm_check_extension(s, KVM_CAP_IRQCHIP) && + (kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0) < 0))) { return 0; } |